7011 ACD/P4ADT
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7011 ACD/P4ADT Bearing Product Overview & Core Advantages
The 7011 ACD/P4ADT is a precision angular contact ball bearing configured as a duplex tandem (DT) pair, delivering exceptional performance for demanding applications. This preloaded set is engineered to handle primarily axial loads in one direction with high rigidity and accuracy. Manufactured to the exacting P4A tolerance class, it offers superior running accuracy and rotational precision, making it an ideal solution for high-speed spindles and other precision machinery where uncompromising performance is critical.
7011 ACD/P4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7011 | Basic bearing series and size designation (55mm bore, 90mm OD, 36mm width). |
| AC | Angular Contact design with a 25° contact angle for optimal axial load capacity. |
| D | Duplex configuration. |
| P4A | High precision tolerance class, exceeding ABEC 7/ISO P4 standards, ensuring minimal runout and vibration. |
| DT | Duplex Tandem arrangement. Two bearings are mounted together to share axial loads in the same direction, effectively doubling the axial load capacity. |
7011 ACD/P4ADT Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex tandem arrangement and preload create an exceptionally rigid bearing system, capable of withstanding high axial loads with minimal deflection. This configuration is specifically designed to handle heavy thrust loads in one direction.
- High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the optimized internal geometry and 25° contact angle contribute to a high limiting speed of 34,000 rpm, suitable for demanding spindle applications.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control on bore, outside diameter, and width. This guarantees superior running accuracy, reduced vibration, and enhanced system performance.
- Premium Materials: Constructed from chrome steel for both rings and balls, ensuring high durability, wear resistance, and a long operational life under high-stress conditions.
7011 ACD/P4ADT Bearing Typical Application Areas
This high-precision, high-speed bearing set is specifically designed for applications requiring maximum axial stiffness and accuracy, including:
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- Precision Grinding Spindles
- High-Frequency Motor Spindles
- Industrial Pumps and Compressors
